Pneumatic fastener



FIG. 1 is a front elevation view showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is rear elevation view thereof;

FIG. 5 is a right side elevation view thereof; and,

FIG. 6 is a bottom plan view thereof.

I claim the ornamental design for a pneumatic fastener, as shown.